QUIET OPERATION: smooth 13-ball bearing reduces rotational friction between roller and shaft
EXTRA QUIET ROLLERS: ball bearing nylon roller wheels are much quieter than original equipment garage rollers
EXTRA LUBRICATION: groove on roller to disperse grease over extended period
STANDARD SHAFT SIZE: 4-5/8" long shaft, 7/16" thick shaft
STANDARD WHEEL SIZE: 1/2" shoulder, 1/2" thickness, 1-13/16" diameter